US4447391A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Brazing alloy containing reactive metals, precious metals, boron and nickel
Assignee: Osram Sylvania Inc
•
Filing: 1982-12-10
•
Granted: 1984-05-08
•
Expires: 2002-12-10
Abstract
Abstract Brazing alloys containing specified amounts of a reactive metal, specified amounts of boron, specified amount of gold, palladium and mixtures thereof and specified amounts of nickel, are ductile, have relatively low melting points. Chromium and silicon are optional metals which can also be utilized in this invention.
Inventors
- 👤 Howard Mizuhara
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-10-27 12:25
CPC Classifications
B; B23; B23K; B23K35/00; B23K35/22; B23K35/24; B23K35/32; B23K35/322; B23K35/30; B23K35/3013; B23K35/3033
Claims Analysis
Total Claims: 7
Claim 1
Independent Claim
98 words
A brazing alloy consisting essentially of from about 0.1% by weight to about 5% by weight of a reactive metal selected from the group consisting of titanium, zirconium, vanadium and mixtures thereof, from about 0.05% by weight to about 4% by weight of boron, from about 15% by weight to about 85% by weight of nickel, from about 0% to about 30% by weight chromium, balance a precious metal selected from the group consisting of gold, palladium and mixtures thereof, said precious metal being present in amounts of from about 5% by weight to about 85% by weight.
Claim 2
Dependent Claim
98 words
A brazing alloy consisting essentially of from about 0.1% by weight to about 5% by weight of a reactive metal selected from the group consisting of titanium, zirconium, vanadium and mixtures thereof, from about 0.05% by weight to about 4% by weight of boron, from about 15% by weight to about 85% by weight of nickel, from about 0% to about 30% by weight chromium, balance a precious metal selected from the group consisting of gold, palladium and mixtures thereof, said precious metal being present in amounts of from about 5% by weight to about 85% by weight.
Claim 3
Dependent Claim
12 words
An alloy according to claim 1 wherein said reactive metal is titanium.
Claim 4
Dependent Claim
51 words
An alloy according to claim 2 wherein said precious metal is gold or mixtures of gold and palladium and is present in amounts of from about 51% by weight to about 83% by weight and nickel is present in amounts of from about 15% by weight to about 40% by weight.
Claim 5
Dependent Claim
50 words
An alloy according to claim 2 wherein said precious metal is palladium and is present in amounts of from about 5% by weight to about 65% by weight and said nickel is present in amounts is present in amounts of from about 25% by weight to about 85% by weight.
Claim 6
Dependent Claim
18 words
An alloy according to claim 4 wherein silicon is present in amounts of up to 4% by weight.
Claim 7
Dependent Claim
12 words
An alloy according to claim 1 wherein said precious metal is gold.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1987-05-08 | 1987-11-07 | 1988-05-08 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1991-05-08 | 1991-11-07 | 1992-05-08 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1995-05-08 | 1995-11-07 | 1996-05-08 | $7700.00 | Window Closed / Lapsed |